Dual-circuit different-frequency power supply circuit for gas discharge lamp

A technology for gas discharge lamps and power supply circuits, which is applied to electric light sources, electrical components, lighting devices, etc., to achieve the effect of reducing ripple coefficient, reducing electromagnetic interference, and solving self-extinguishing phenomenon

Inactive Publication Date: 2010-12-29
江苏鑫田电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, whether the rectifiers used in the existing gas discharge lamps are inductive rectifiers or electronic rectifiers, they all have their own inherent defects and difficult technical problems.

Method used

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  • Dual-circuit different-frequency power supply circuit for gas discharge lamp
  • Dual-circuit different-frequency power supply circuit for gas discharge lamp
  • Dual-circuit different-frequency power supply circuit for gas discharge lamp

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specific Embodiment approach

[0022] figure 1 , figure 2 It is an embodiment of the present invention. It is a dual-channel different-frequency power supply for gas discharge lamps. It consists of a mains input wire 1, a power supply shell 2, an integrated circuit board 3, a dual-frequency output wire 4 and a power cover 5. The integrated circuit board 3 contains a dual-channel different-frequency power supply circuit for a gas discharge lamp, which includes a power factor compensation capacitor C1, a rectifier inductor E, a filter capacitor C2, and a high-frequency power generation circuit F. The rectifier inductor E is composed of an inductor Inductor L1 and inductor L2. Inductor L1 is located between mains input terminal A and dual-frequency power supply output terminal C. Inductor L2 is located between mains power input terminal B and dual-frequency power supply output terminal D. Power factor compensation capacitor C1 Located between the mains input terminal A and the mains input terminal B, the fil...

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Abstract

The invention provides a dual-circuit different-frequency power supply circuit for a gas discharge lamp, which supplies power to a lamp tube by a power-frequency high-current power supply and a high-frequency low-current power supply which are connected in parallel and is composed of a power factor compensation capacitor C1, a rectifying inductor E, a filter capacitor C2 and a high-frequency power generating circuit F. As the rectifying inductor E does not need to supply starting excitation high-voltage to the lamp tube, a pure inductance rectifier can be selected; and when the lamp tube is subject to normal lighting, the operating voltage of the inductance rectifier is close to mains voltage, thus improving utilization ratio of electric energy. When the lamp tube is started and subject to normal lighting, the power of the high-frequency power generating circuit F is less than 50W, and the frequency of the generating circuit is designed as 2.5MHz-3MHz which is more favorable for exciting free electrons in the lamp tube, improving lighting effect and protecting electrodes. The output power of the whole circuit is controlled by adjusting the size of an inductor L1 and an inductor L2. The dual-circuit different-frequency power supply circuit adopts a symmetrical design to reduce electromagnetic interference.

Description

technical field [0001] The invention relates to an electronic rectifier circuit for a gas discharge lamp. Background technique [0002] Gas discharge lamps include high-pressure sodium lamps, high-pressure mercury lamps, metal halide lamps, xenon lamps, fluorescent lamps, etc. At present, the rectifiers that match these lamps on the market can be divided into two types, one is an inductive rectifier, and the other is an electronic rectifier. . They all use a single power supply to power the gas discharge lamp, and there are insurmountable defects in the actual use process. [0003] The power factor of the inductance rectifier is not high, and its own consumption accounts for 4% to 10% of the total energy consumption. To improve the power factor of the inductance rectifier, although the capacitance compensation method can be adopted to overcome it, the nearby compensation will affect the life of the lamp, so the individual current is large, the input wire must be thick, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/285
Inventor 李绪鹏李建明
Owner 江苏鑫田电子科技有限公司
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